So my doctor has changed my baby's milk to nutramigen as she thinks he may have a cows milk allergy but since I've given it to him he seems in absolute agony with not being able to get wind out. His been up all night pulling his legs up and crying, worse than when he was on his other milk. Is this just a normal thing to happen when changing a baby's milk. I've only given him 6 bottles of the new milk. Do I continue with this milk or change him back to his other one? ( he wasn't good on the other one at all but at least could get some sleep with that one) or do I just ride it out with the new one?